Date: Wed, 17 Mar 2004 16:22:08 -0800 From: "David O'Brien" <obrien@freebsd.org> To: Alexander Leidinger <Alexander@Leidinger.net> Cc: cvs-src@freebsd.org Subject: Re: cvs commit: src/share/mk bsd.cpu.mk bsd.dep.mk bsd.lib.mk bsd.sys.mk src/sys/conf files kern.mk kern.pre.mk kmod.mk src/sys/dev/aic7xxx/aicasm Makefile Message-ID: <20040318002208.GC2541@dragon.nuxi.com> In-Reply-To: <20040315180324.0fa39609@Magellan.Leidinger.net> References: <200403122136.i2CLaCm9096276@repoman.freebsd.org> <20040315033213.GA40858@dragon.nuxi.com> <20040315180324.0fa39609@Magellan.Leidinger.net>
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On Mon, Mar 15, 2004 at 06:03:24PM +0100, Alexander Leidinger wrote: > > > Problems with icc v8: > > > - panic: npx0 cannot be emulated on an SMP system > > > - UP: first start of /bin/sh results in a FP exception > > > > You forgot the other problems with icc v8 -- Intel's preditorial > > behavior. Note that some parts of the Intel compilers support libs do a > > CPUID call and if it notes an AMD CPU either segfaults or dumbs down the > > capabilities of the CPU to that of the original i386. > > AFAIK: > - only if the compiled binary contains the main function > (the kernel doesn't) > - only if you use a specific compiler option, which I don't use here It happens in several circumstances, not just when using one particular compiler option. > To circumvent this I suggest to read > http://groups.google.com/groups?dq=&hl=en&lr=&ie=UTF-8&oe=UTF-8&group=comp.arch&selm=a13e403a.0402091438.14018f5a%40posting.google.com > > BTW.: AFAIK it doesn't segfault, it exit()s. BTW, icc v8 produced binaries will sometimes segfault on AMD processors. Trust me, AMD has tested this issue more than you have. > Any manufacturer is free to limit the use of his programs as he wants. I > agree, this behavior isn't nice, but life isn't nice either (sometimes). Then I'd like to take the stance of reanble the blind use of EFER.NXE in the FreeBSD/amd64 loader -- Intel ia32e can just add that feature. -- -- David (obrien@FreeBSD.org)
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